The Iranian firm was Shahid Hemmat Industrial Group. The other was theNorth China Industries Corp (search).

Public documents disclosing the sanctions were made available on Thursday. The effective date of the sanctions was May 9.

No information was given about the destination or the type of technology that was exported by the two companies. Efforts to obtain additional information fromState Department (search) officials were unsuccessful.

The sanctions essentially ban U.S. trade with the entities and all U.S. government dealings with them for two years.